|First TOPS|Second TOPS|First TOPS|Second TOPS|First TOPS|Second TOPS|First TOPS|Second TOPS|
|---|---|---|---|---|---|---|---|
|102|101|106|105|140|104|141|105|
|142|108|143|100|144|101|145|103|
|146|109|147|111|148|114|149|121|
|150|122|160|104|161|107 & 108|162|101|
|163|110|164|101|165|111|166|104|
|167|108|168|101 & 111|169|104|170|105|
|171|101|172|116|173|115|174|118|
|175|116|176|117|177|115|178|119|
|179|120|180|124|181|124|182|123|
|183|123|184|123|185|125|186|127|
|187|126|188|126|189|126|190|130|
|201/1|201|201/2|202|201/3|203|202/1|206|
|202/2|207|202/3|205|203|204|211/1|206|
|211/2|207|211/3|205|212|204|221/1|201|
|221/2|202|221/3|203|222/1|206|222/2|205|
|223/1|201|223/2|202|223/3|203|224|207|
|225|203|261|251|||||

Question: what is the largest first tops class number?
Answer: 261